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  <id value="demo-spiro-mbr-1-2" />
  <status value="final" />
  <!--
20150-9   FEV1	19868-9    Forced vital capacity [Volume] Respiratory system by Spirometry      L	19926-5 - FEV1/​FVC	33452-4  - Maximum expiratory gas flow Respiratory system airway

-->
  <code>
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      <system value="http://loinc.org" />
      <code value="19868-9" />
      <display value="Forced vital capacity [Volume] Respiratory system by Spirometry" />
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  <subject>
    <reference value="Patient/demo-patient-1" />
  </subject>
  <effectiveDateTime value="2018-03-12" />
  <valueQuantity>
    <value value="4.356" />
    <system value="http://unitsofmeasure.org" />
    <code value="L" />
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</Observation>